All Questions
10
questions
2
votes
2
answers
771
views
Is there a different way to measure speed, other than with time?
A second on Earth is different from a second on the Sun and a second next to a black hole. Therefore speed, as measured in meters per second, is different in each of these locations. Is there an ...
- 4,783
0
votes
1
answer
155
views
Is 'rest mass' same for every observer/perspective? [duplicate]
(This is a quick one)
Suppose Im standing still (in my perspective) and a hoverboard is flying at $0.8c$ w.r.t me.
I see that the ball (red) is moving at $0.8c$. I measured earlier that the ball is $...
- 1,305
0
votes
3
answers
662
views
Will you see distance contraction inside the space ship at near light speed?
We know that distance to destination contracts for a passenger in a spaceship traveling at near the speed of light. If a spaceship is traveling at 0.865C to the outside observer, then the distance to ...
0
votes
2
answers
95
views
Does increase in relativistic mass with speed violate principle of relativity?
From special relativity we know that,
$$ m = \frac{m_0}{\sqrt {1-\frac {v^2}{c^2}}} $$
where,
$m$, $m_{0}$ and $v$ are the relativistic mass, rest mass of the object and speed relative to the observer ...
1
vote
2
answers
106
views
Would a human age faster if these certain conditions are met?
So, a human would travel in a rocket in outer space. There is little to no gravity, and the pressure may or may not have an affect (?) on what i'm about to ask. It has been proven that when a human ...
- 11
2
votes
2
answers
821
views
How speed affects time?
Rewrote the question so hopefully it makes sense.
What causes time dilation? Is it due to the slowing of the atoms vibration that effects the measurement of time?
If we are using the vibrations of ...
- 21
1
vote
1
answer
87
views
Does travelling towards something at relativistic speed cause it to appear to speed up?
If one were to travel towards a giant TV floating in space, at a fraction of the speed of light, would a video playing on the TV appear to play faster?
I'm guessing the answer is no. From what I ...
- 113
2
votes
3
answers
2k
views
Why is the relative speed between two inertial frames the same for observers in each frame?
Consider two frames $S$ and $S'$, moving relative to each other. If I stand still in frame $S$ and watch frame $S'$, I can measure its speed to be $V$. However, why is this speed the same as the ...
- 838
0
votes
0
answers
68
views
Speed of light, comparison of two light waves travelling side by side
okay so.here is setup of my question...say we have two observers A and A'..A is fixed to origin of coordinate axis x,y while A' is inside a hollow box (shown as rectangle MNRP) whose one side MN has ...
- 57
-2
votes
2
answers
14k
views
Why does time slow down when traveling at high speeds [duplicate]
One of the effects of traveling at high speeds is slowing down of clocks. I can understand gravity time dilation effect but not how would velocity affect clock speeds.
How correct it is, if I say ...
- 1